:root{--bg: #fff;--fg: #1a1a1a;--muted: #667;--line: #e3e5e8;--accent: #0b57d0;--sel: #eaf1fd;font:14px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}*{box-sizing:border-box}body{margin:0;color:var(--fg);background:var(--bg)}button{font:inherit;cursor:pointer}.app{display:flex;flex-direction:column;height:100vh}.topbar{display:flex;align-items:center;gap:12px;padding:10px 16px;border-bottom:1px solid var(--line)}.topbar .spacer{flex:1}.topbar .who{color:var(--muted)}.search input{width:320px;padding:6px 10px;border:1px solid var(--line);border-radius:6px}button.link{background:none;border:none;color:var(--accent);text-decoration:underline;padding:0}.error{display:flex;justify-content:space-between;gap:12px;background:#fdecea;color:#8a1c1c;padding:8px 16px;border-bottom:1px solid #f5c6c2}.panes{display:grid;grid-template-columns:220px 340px 1fr;flex:1;min-height:0}.folders{border-right:1px solid var(--line);overflow-y:auto;padding:8px}.folder{display:flex;justify-content:space-between;width:100%;padding:8px 10px;border:none;background:none;border-radius:6px;text-align:left}.folder:hover{background:#f4f6f8}.folder.active{background:var(--sel);color:var(--accent);font-weight:600}.badge{background:var(--accent);color:#fff;border-radius:10px;padding:0 7px;font-size:12px}.list{list-style:none;margin:0;padding:0;border-right:1px solid var(--line);overflow-y:auto}.row{padding:10px 14px;border-bottom:1px solid var(--line);cursor:pointer}.row:hover{background:#f7f9fb}.row.selected{background:var(--sel)}.row.unread .subject,.row.unread .from{font-weight:700}.row-top{display:flex;justify-content:space-between;gap:8px}.from{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.when{color:var(--muted);font-size:12px;flex-shrink:0}.subject{color:#333;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.empty,.placeholder{padding:24px;color:var(--muted);text-align:center}.reader{display:flex;flex-direction:column;min-height:0;overflow-y:auto}.reader-head{padding:16px;border-bottom:1px solid var(--line)}.reader-head h2{margin:0 0 8px;font-size:18px}.meta{color:var(--muted);font-size:13px}.actions{margin-top:10px;display:flex;gap:8px}.actions button{padding:5px 12px;border:1px solid var(--line);background:#fff;border-radius:6px}.attachments{display:flex;flex-wrap:wrap;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line)}.attachments button{border:1px solid var(--line);background:#fafbfc;border-radius:6px;padding:6px 10px}.attachments small{color:var(--muted)}.remote-banner{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff8e1;border-bottom:1px solid #f0e0a0;padding:8px 16px;font-size:13px}.body-text{padding:16px;white-space:pre-wrap;word-break:break-word;margin:0;font:inherit}.body-html{flex:1;display:flex;flex-direction:column;min-height:0}.body-frame{flex:1;width:100%;border:0;min-height:420px;background:#fff}.login{max-width:320px;margin:12vh auto;display:flex;flex-direction:column;gap:12px;padding:24px;border:1px solid var(--line);border-radius:10px}.login h1{margin:0 0 4px;font-size:20px}.login input{padding:9px 12px;border:1px solid var(--line);border-radius:6px}.login button{padding:10px;background:var(--accent);color:#fff;border:none;border-radius:6px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;display:flex;align-items:center;justify-content:center}.modal{background:#fff;border-radius:10px;padding:20px;width:min(680px,92vw);display:flex;flex-direction:column;gap:10px;max-height:90vh;overflow-y:auto}.modal h2{margin:0;font-size:17px}.modal label{display:flex;flex-direction:column;gap:4px;font-size:13px;color:var(--muted)}.modal input,.modal textarea{padding:8px 10px;border:1px solid var(--line);border-radius:6px;font:inherit;color:var(--fg)}.modal input[readonly]{background:#f4f6f8;color:var(--muted)}.modal-actions{display:flex;justify-content:flex-end;align-items:center;gap:14px}.modal-actions button:not(.link){padding:8px 18px;background:var(--accent);color:#fff;border:none;border-radius:6px}@media(max-width:900px){.panes{grid-template-columns:1fr;grid-template-rows:auto auto 1fr}.folders{display:flex;overflow-x:auto;border-right:none;border-bottom:1px solid var(--line)}}